Review and perspectives of AFM application on the study of deformable drop/bubble interactions

Atomic force microscopy of food assembly: Structural and mechanical insights at the nanoscale and potential opportunities from other fields

“…Pioneer development of both mathematical models (Dagastine, Stevens, Chan, & Grieser, 2004;Tabor, Grieser, Dagastine, & Chan, 2012, 2011Wang et al, 2015) and technical set-ups (Dagastine, 2006;Gunning, Mackie, Wilde, & Morris, 2004, Fig. 7A and B) by the IFR Norwich and the University of Melbourne groups have opened a field of research for the AFM investigation of interactions between deformable bodies such as droplets or bubbles.…”

“…7 C②). As load increases, the Laplace pressure of the bubble or droplet, defining nonpenetrable thickness, causes their deformation normal to the applied force, with possible wavy features forming at the contact area (Gunning et al, 2004;Wang et al, 2015). Depending on the bulk composition and the fluxes of the thin film between the two objects, local depletion in, e.g., bulk material sometimes induces a strong attraction, visible as a jump-in event (Gunning & Morris, 2018;Tabor et al, 2012, Fig.…”

Probing surface interactions of underwater oleophobic polyelectrolyte multilayers

“…This study has been facilitated by the advent of the atomic force microscope (AFM) (Binnig et al 1986), which permits the direct force measurement of interactions between homoand hetero-bodies within nano-Newton scale (Mate et al 1989;Snyder et al 1997;Aston and Berg 2002;Malotky and Chaudhury 2001). Moreover, the development of probe modification technique has promoted the exploration of interactions between deformable droplets/bubbles and solid surfaces (Dagastine et al 2004a(Dagastine et al , 2006Gunning et al 2004;Vakarelski et al 2010a;Balasuriya and Dagastine 2012;Tabor et al 2011a, b;Wang et al 2015;Jin et al 2017;Shi et al 2017). One interesting study applied the drop probe AFM technique to elucidate the intrinsic wetting mechanism of polyelectrolyte surfaces with varied hydrophobicity.…”

Investigation of the Stability of Liquid and Air Films by Synchronized Tri-Wavelength Reflection Interferometry Microscope

“…In the 10 -2 M NaCl solutions, the Debye length (κ -1 ) is 3.04 nm. 55 In this case, the contributions from the electrostatic double-layer interaction (Пe) to the total disjoining pressure (П) is negligible at a separation distance of above 20 nm. Therefore, only the van der Waals dispersion and hydrophobic forces are considered in the context of the surface forces.…”

“…This limitation makes the AFM be a semi-quantitative technique to build the evolution of the thinning of liquid films. Due to the presence of surface forces and hydrodynamic effect 55 , the bubble can deform, and we can assume the air bubble deforms as a Hookean spring, which gives the actual distance as,…”